Permutation-lock.



E. S. PERRY.

PERMUTA'HON LOCK.

APPLICATION nuzn JUNE I. ma.

Patented Feb. 18, 1919.

J n I. 0

mm B. PERRY, OF NEWARK, OHIO.

PEBHU'IATIOH-IDOK.

Specification of Letters Patent.

Patented Feb. 18, 1919.

Application filed June 1, 1818. Serial No. 237,778.

To all whom it may concern:

Be it known that I, ELKANNAH S. PERRY, a citizen of the United States, residin at Newark, in the county of Licking and tate of Ohio, have invented certain new and useful Im rovements in Permutation-Locks; and I declare the following to be a full, clear, and exact descri tion of the invention, such as will enable others skilled in the art to which it-appertains to make and use the same.

My invention relates to permutation locks and more particularly to pad locks, althou h the bolt retracting means constituting t e principal novelty of the invention, is equally well adaptable to numerous other kinds of locks.

One object of the invention is to rovide for easy assembling and disassemb ing of the look.

A further object is to rovide a novel operating disk which must e turned to and fro in a predetermined manner to release the lock.

With the foregoing objects in view, the invention resides in the novel features of construction and unique combinations of parts to be hereinafter fully described and claimed, the dscriptive matter being supplemented by the accompanying drawings which form a part of this specification and in which: i v

Figure 1 is a sectional view illustrating the first step in opening the lock;

Fig. 2 discloses the second position of P Fi 3 illustrates the third step in releasin t e lock;

t if. 4 discloses the locking bolt complete y released;

Fig. 5 is a horizontal section on the plane indicated by the line 5-5 of Fig. 4;

Figs. 6 and 7 are detail vertical sections through the operating disk.

In t e drawings above briefly described,the numeral 1 desi ates a suitably shaped casing having a shac e 2 with one end 3 slidabl and rotatabl mounted in the casing an provided with a coiled sprin 4 which tends to project the shackle to re eased position the moment the locking bolt is retracted. The other end of the shackle 2 projects normally through an opening 5 in the edge of the casing 1 and retains a pivoted atch member 6 in operative position as seen most clearly in Fig. 5, said latch being received in a notch 7 or other suitable keeper with which the removable side plate 8 of casing 1 is provided. This plate is preferably he (1 in place by pins 9 and bayonet slots 10 and must therefore be rotated a slight distance before it can be removed. This rotation however is prevented by the latch 6 until the lock is released and the shackle opened. When this is done, a small instrument may be inserted in the opening 5 to release the latch 6, whereupon plate 8 may be turned to the required extent and then entirely detached, thus giving access to the interior of the lock.

To retain the shackle 2 in operative or locked position, a sliding bolt 11 is mounted in the casing 1, preferably at the up er end of the latter, the free end of said bo t bein receivable in a notch 12 in the shackle. Bo t 11 is provided with an inwardly extending lug 13 with which the upper end of an operating lever 14 cooperates, said lever being fulcrumed to a suitable arm 15 depending from a plate 15 u on the lower side of which the bolt 11 is mounted, said plate bein secured to the upper end of the casing the edge of said plate opposite arm 15 having a depending flange 15 between which and said arm, the bolt slides. For a purpose to hereinafter appear, it is desirable that the lever 14 shall be normally forced in one direction by spring tension, and as it is also desirable to pro]ect the bolt 11 i by s ring action, I preferably provide a doub e acting s ring 16 connected operatively to both said lever and bolt to act upon them in the required manner.

The end of the lever 14 remote from the lug 13 is provided with a laterally extending finger or shoe 1''! receivable in grooves formed in one face of an operatin v disk 18 located in the casing 1, Disk 18 is shown as provided with three grooves 19, 20 and 21, and with a master way 22 extending from the center of the disk to its ed One end of grove 19 communicates with t e master way 22 and the other end of said oove opens at 19 into the groove 20, the fitter being at this point slightly greater in depth than the groove 19. The end of groove 20 ad'acent the point 19, communicates with t e master way 22, while the other end of said groove 20 opens at 20 into the third groove 21, the latter at the oint20, bein of greater depth than groove 50. Adjacent the point 20', the groove 21 opens into the master way 22 and at 21 the other end of groove 21 bulges abruptly outward and communicates also with the master ith the disk 18 standing as seen 1n Fig. 1 the shackle 2 is locked in closed position and the shoe 17 is located at the entrance to the groove 19. The disk is now turned a predetermined amount so that shoe 17 1s guided into groove 20 as seen in Fig. 2, and it will be observedthat if the disk is turned a fraction of an inch too far, the shoe will be disposed in the master way 22, whereupon the spring 16 will return the lever 14 to its initial osition. From the position of Fig. 2 the dis 18 is turned in the opposite direction so that shoe 17 travels around roove 20 and enters groove 21 as seen in ig. 3. Here again, if t e disk is turned to an excessive extent, the shoe will leave groove 21 and enter the master way 22, in which it will return to its initial position. From the position illustrated in Fig. 3 the disk 18 is again turned in the direction in which it was first rotated, whereby to cause shoe 17 to travel around groove 21, the bul e 21 of the latter serving to impart the fina movement to lever 14 which retracts the bolt 11 (see Fig. 4). When this takes place, the spring 4 orces the shackle 2 outwardly to permit it to be swung aside. By now turning the disk 18 a fraction of a revolution, lever 14 will return to its initial position, due to reception of shoe 17 in the master way 22, and spring 16 will exert a constant stress on the bolt 11, such stress serving to project the bolt into the notch 12, the moment the shackle is again forced home.

By means of a central stub shaft 23 and a nut 24, the disk 18 is secured frictionalli against one side of a second and lar er dis 25, the latter being rotatably mounte on the shaft 23 and havlng an o crating knob 26 located on the exterior o the casing. By turning this knob to and fro in the predetermined manner, the lock ma be released as above described, and in or or that the device may be operated successfully either in daylight or dark, the disk 25 is provided with a plurality of relativel large notches 27 and with a series of 'sma ler notches 28, all of which coiiperate with a ring click 29. When employing the com ination shown, the knob 26 is rotated clockwise until the operator feels and hears the click 29 travel over the series of notches 28 and into the first relatively lar notch 27. B turning knob 26 and counting five clicks, the lparts are located as in Fig. 2. Rotation of t e knob in the oplposite direction for five clicks will locate t e parts as seen in Fig.

3, and movement of said knob for six clicks in the direction in which it was first turned, will now release the look as seen in Fig. 4. A sli ht counterclockwise turn is now all that is necessary to a ain set the a look so that it will snap to loc ed position when the shackle is forced in.

By securing the disk 18 a ainst the disk 25 in the manner shown and ascribed, or in any other equivalent manner, it will be obvious that the two may be relatively adjusted in such a manner as to vary the starting point of the combination in a great number of ways; and particular emphasis is laid upon the fact that no change in combination necessitates a change in the construction on the disk 18. 1

Particular attention is directed to the fact that the grooves in the disk 18 are in the side thereof facing the side of the casing which is open before application of the plate 8, and to the carrying of the bolt 11, the lever 14 and sprin 16 by the plate 15". By these features, a er the disk has been mounted in the casing, the aforesaid bolt, lever, spring and plate are inserted as a unit into t e casing through its open side, the shoe 17 being then receivable in one of the cam grooves or in the masterway 22 of the disk. A single screw is all that is required to secure the plate 15" to the casing.

I claim:

1. The combination with a lock casing having an open side, a rotatable disk in said casing, the side of said disk facing said open side of the casinghaving a cam groove, and a shackle mounted on said casin a bolt for locking said shackle, a lever or releasing said bolt, a sprin connected to and carried by said lever and olt for projecting the latter and yieldably holding said lever in ino erative position, a plate upon which said lever an bolt are both mounted, said late, bolt and lever being insertible into said casing as a unit through the open side thereof and said lever having a lateral shoe then receivable in said cam groove, means for securing said dplate in said casing, and a closure or sai open side of the casing.

2. A permutation lock comprising a easin a s ackle extendin into said casing, a ho t for locking sai shackle, releasing means for said bolt having an operating shoe, and a rotatable disk in said casing for operating said releasing means, said disk havin a relatively wide recess in one side exten ing from its center to its edge, the center line of said recess being dis osed a groximately on a radial line, said side of t e 1sk also having inner, outer and intermediate cam grooves to receive said shoe, the full length of the inner roove and the greater part of the length of the other grooves being concentric with said disk, both ve and the inner end of said ends of the inner and outer grooves and one orming a. truly circular track in which said 10 end of said intermediate groove opening into shoe travels idly when the disk is turned in opposite sides of said recess, the other end of one direction. said intermediate groove opening into said In testimony whereof I have hereunto set outer groove, and the opposite end of said my hand.

inner groove having a transfer groove open- ELKANNAH S. PERRY. ing into said intermediate groove, saidiinner t 

